Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/autofill/loading_animation.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_
 #define CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_
 
 #include "ui/gfx/animation/linear_animation.h"
 
 namespace autofill {
 
 // An animation for a dancing ellipsis.
 class LoadingAnimation : public gfx::LinearAnimation {
  public:
   explicit LoadingAnimation(gfx::AnimationDelegate* delegate,
                             int font_height);
-  virtual ~LoadingAnimation();
+  ~LoadingAnimation() override;
 
   // gfx::Animation implementation.
-  virtual void Step(base::TimeTicks time_now) override;
+  void Step(base::TimeTicks time_now) override;
 
   // Returns the vertical pixel offset for the nth dot.
   double GetCurrentValueForDot(size_t dot_i) const;
 
   // Stops this animation. Use this instead of Stop() to make sure future
   // runs don't mess up on the first cycle.
   void Reset();
 
  private:
   // Describes a frame of the animation, a la -webkit-keyframes.
   struct AnimationFrame {
     double value;
     double position;
   };
 
   // True if the current cycle is the first one since Reset() was last called.
   bool first_cycle_;
 
   // The font height of the loading text, which gives the factor by which to
   // scale the animation.
   const int font_height_;
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_